Grasshopper and Tettigoniid

Grasshopper noun - Terrestrial plant-eating insect with hind legs adapted for leaping.

Tettigoniid and grasshopper are semantically related. In some cases you can replace term "Tettigoniid" with "Grasshopper", this nouns are similar.

Tettigoniid noun - Grasshoppers with long threadlike antennae and well-developed stridulating organs on the forewings of the male.

Grasshopper and tettigoniid are semantically related. You can use "Grasshopper" instead a noun "Tettigoniid".